GK-CDS-2009 MCQ Question and Answer

GK-CDS-2009 MCQ Question and Answer
41. Consider the following statements— X-rays 1. can pass through thin sheets of aluminium 2. can be deflected by magnetic field 3. move with a velocity less than the velocity of ultraviolet rays in vacuum Which of the statements given above is/are correct ?
  • 1, 2 and 3
  • 1 only
  • 2 and 3 only
  • 1 and 2 only
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42. If a small raindrop falls through air—
  • its velocity goes on increasing
  • its velocity goes on decreasing
  • its velocity goes on increasing for some time and then becomes constant
  • it falls with constant speed for some time and then its velocity increases
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43. Television signal cannot be received generally beyond a particular distance due to—
  • curvature of the earth
  • weakness of antenna
  • weakness of signal
  • absorption of signal in air
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44. Because of which one of the following factors, clouds do not precipitate in deserts ?
  • Low pressure
  • Low humidity
  • High wind velocity
  • High temperature
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45. Which one of the following is an object with such a strong gravitational field that even light cannot escape from its surface ?
  • Neutron star
  • White dwarf
  • Black hole
  • Supernova star
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46. Which one of the following is a medium range surface to air missile ?
  • Trishul
  • Nag
  • Prithvi
  • Akash
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47. Match List-I with List-II and select the correct answer using the codes given below the lists : List-I (Vitamin) (a) Vitamin A (b) Vitamin B1 (c) Vitamin C (d) Vitamin E List-II (Chemical Compound) 1. Thiamin 2. Retinol 3. Ascorbic acid 4. Tocopherol Codes : (a) (b) (c) (d)
  • 4 1 3 2
  • 2 3 1 4
  • 4 3 1 2
  • 2 1 3 4
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48. Which one of the following is the tide produced as a consequence of moon and sun pulling the earth in the same direction ?
  • Spring tide
  • Neap tide
  • High tide
  • Low tide
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49. Aqua regia used by alchemists to separate silver and gold is a mixture of—
  • hydrochloric acid (concentrated) and nitric acid (concentrated)
  • hydrochloric acid (concentrated and sulphuric acid (concentrated)
  • nitric acid (concentrated) and sulphuric acid (concentrated)
  • hydrochloric acid (dilute) and sulphuric acid (dilute)
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50. Commercial vulcanization of rubber involves—
  • sulphur
  • carbon
  • phosphorus
  • selenium
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